Question

what will happen to the kinetic energy of the body if mass remains the same and the velocity is doubled

Answer 1

HEY MATE HERE IS UR ANSWER

KINETIC ENERGY IS ENERGY WHICH IS PROCESSED DUE TO MOTION OF THE OBJECT

NOW GOING TO THE SOLUTION

WE KNOW THAT

KINETIC ENERGY (K) IS =
$\frac{1}{2} (m \: {v}^{2} )$

SO NOW ACCORDING TO QUESTION

THE MASS IS REMAINED SAME AND THE VELOCITY IS DOUBLED SO THE CHANGE IN KINETIC ENERGY

WOULD BE

$\frac{1}{2}(m. {(2v)}^{2} )$
THIS IS EQUAL TO

$\frac{1}{2} (m.4 {v}^{2} )$
NOW CANCELLING 1/2 AND 4 WE HAVE

$m2 {v}^{ {}^{2} }$
HENC THE CHANGE IN KINETIC ENERGY IS EQUAL TO 4 TIMES

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